Some regional servers still get decent traffic, especially on popular map rotations like dust2 and inferno. The community around older CS versions has stayed more consistent than most people expect. That said, a lot of players who start on classic versions eventually move toward CS2 where the active player base is much larger. The game mechanics are different enough that it takes some adjustment — weapon behavior, economy rules, and movement all work in their own way. https://dmarket.com/cs2-wiki/ is a useful reference for getting familiar with how CS2 functions, covering everything from weapon stats to general game mechanics in a straightforward way. Helps make the transition from older versions feel less overwhelming